Developments in Mobile/Portable Telephones and Key Devices for Miniaturization (Special Issue on Microwave Devices for Mobile Communications)
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概要
- 論文の詳細を見る
Fundamental microwave key devices used in achieving compact mobile/portable telephones (radio units) are discussed. The historical development flow of the systems and radio units are introduced, with respect to the 800-/900-MHz and 1.5-GHz Japanese cellular radio systems. The design concept of the developed radio units is briefly described. Technical requirements for RF circuits are reviewed and the developed key devices are practically applied to the circuits. Key factors in the requirements are also shown. Finally, future trends for the key devices are surveyed from the stand point of achieving a smaller and more light weight pocket radio unit.
- 社団法人電子情報通信学会の論文
- 1996-05-25
著者
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NOJIMA Toshio
NTT Mobile Communcations Network Inc. (NTT DoCoMo)
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NOJIMA TOSHIO
Radio Environment Technology Research Laboratory, NTT DoCoMo, Inc.
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Nojima Toshio
Radio Environment Technology Research Laboratory Ntt Docomo Inc.
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Nojima Toshio
Wireless Laboratories Ntt Docomo Inc.
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Nojima T
Graduate School Of Information Science And Technology Hokkaido University
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URABE Shuuji
NTT Mobile Communications Network Inc. (NTT DoCoMo)
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Urabe S
Ntt Mobile Communications Network Inc. (ntt Docomo)
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